CN114449074B - Slewing mechanism, strutting arrangement and electronic equipment - Google Patents

Abstract

The application provides a slewing mechanism, strutting arrangement and electronic equipment relates to electronic equipment technical field, can increase the R angle of folding screen, prolongs the life of folding screen, and simple structure. The rotating mechanism comprises a base, a first door plate, a first connecting piece and a first swing arm. The first door plate is hinged to the base, the first connecting piece is hinged to the first door plate, and the first connecting piece is used for fixing the first shell. The base is also used for connecting the second shell. The base, the first door plate, the first shell and the second shell are provided with binding surfaces, and the binding surfaces are used for binding the folding screen. A first door plate is provided with a first guide chute; the first connecting piece is provided with a second guide sliding groove. One end of the first swing arm is hinged to the base, a first sliding piece is arranged at the other end of the first swing arm, and the first sliding piece is slidably connected into the first guide sliding groove and the second guide sliding groove. The rotating mechanism provided by the embodiment of the application is used for supporting the bent part of the folding screen.

Description

Rotary mechanism, supporting device and electronic equipment

technical field

The present application relates to the technical field of electronic equipment, in particular to a rotating mechanism, a supporting device and electronic equipment.

Background technique

With the development of folding screen technology, folding screen mobile phones have become a hot technology. The existing folding methods are divided into inner folding and outer folding, that is, the screen is folded inside or outside. The problem with the outward fold is that the screen is exposed and easily scratched by hard objects.

At present, the folding mechanism used to realize the inward folding of the folding screen has a complex structure and too many parts. The large inner folding angle (that is, the R angle) of the folding screen is folded through a complex rotating mechanism to protect the folding screen from damage. However, the complexity of the mechanism and components makes the folding unstable and prone to errors.

Contents of the invention

Embodiments of the present application provide a rotating mechanism, a supporting device, and an electronic device, which can fold the folding area of the folding screen into a drop shape when it is in the folded state, increase the folding R angle, and prolong the service life of the folding screen.

In order to achieve the above object, the embodiments of the present application adopt the following technical solutions:

In a first aspect, some embodiments of the present application provide a rotating mechanism, the rotating mechanism includes a base, a first door panel, a first connecting member, and a first swing arm. The first door panel is hinged on the base, and the first connecting piece is hinged on the first door panel. The first connecting piece is used for fixing with the first casing. A first guide chute is arranged on the first door panel. A second guide chute is arranged on the first connecting piece. One end of the first swing arm is hinged on the base, and the other end of the first swing arm is provided with a first sliding part, and the first sliding part is slidably connected in the first guide chute and the second guide chute. The base, the first door panel and the first shell all have a fitting surface, and the fitting surface is used for fitting the folding screen. The first link can rotate between an unfolded position and a folded position relative to the base. When the first connecting member is in the unfolded position, the fitting surface of the base, the fitting surface of the first door panel and the fitting surface of the first housing are coplanar and have the same orientation. When the first connecting member is in the folded position, the angle between the fitting surface of the base and the fitting surface of the first door panel on the side for fitting the folding screen is α, and α is less than 90°, and the first door panel The angle between the fitting surface and the fitting surface of the first housing on the side for fitting the folding screen is β, and β is greater than 180°, and the fitting surface of the first casing and the fitting surface of the base Vertical or nearly vertical.

The support device provided in this embodiment can fold the folding screen part attached to the bonding surface of the base, the bonding surface of the first door panel and the bonding surface of the first casing into a drop shape, so as to increase the The R angle of the bending area can prolong the service life of the folding screen.

In a possible implementation manner of the first aspect, α is greater than or equal to 65° and less than or equal to 82°. In this way, the included angle between the fitting surface of the base and the fitting surface of the first door panel is moderate, which can increase the R angle of the bending area of the folding screen and effectively prolong the service life of the folding screen.

In a possible implementation manner of the first aspect, the hinge axis between the first door panel and the base is the first hinge axis, the first hinge axis is located on the side facing the fitting surface of the base, and the first hinge axis It is set at intervals with the bonding surface of the base. In this way, when the first connecting part rotates from the unfolded position to the folded position, the base can be sunk to avoid the folding screen, so that the folding screen has a larger inward chamfer angle, which can prolong the service life of the folding screen. When the first connecting part rotates from the folded position to the unfolded position, the base can be lifted so that the bonding surface of the base is flush with the bonding surface of the first door panel and the bonding surface of the first shell, so as to ensure the flatness of the folding screen .

In a possible implementation manner of the first aspect, the hinge axis between the first connecting member and the first door panel is a second hinge axis, and the abutment surface of the second hinge axis and the first door panel is close to the abutment surface of the first housing. The edges of the facets coincide. In this way, when the first connecting member moves between the unfolded position and the folded position, the relative position between the edge of the fitting surface of the first door panel close to the fitting surface of the first casing and the fitting surface of the first casing is fixed. , will not damage the folding screen, thereby prolonging the service life of the folding screen.

In a possible implementation manner of the first aspect, the first guide chute and the second guide chute are located on a side of the bonding surface of the first door panel away from the folding screen. The orthographic projection of the first guide chute on the fitting surface of the first door panel is the first projection, the orthographic projection of the second guide chute on the fitting surface of the first door panel is the second projection, and the fitting of the first door panel The edge of the fitting surface close to the base is the first edge, the edge of the fitting surface of the first door panel close to the fitting surface of the first shell is the second edge, and the first projection and the second projection are located where the first edge is located. between the line of and the line where the second edge lies. In this way, the structure of the rotating mechanism is simple and the volume is small. And the first guide chute and the second guide chute will not interfere with the folding screen.

In a possible implementation manner of the first aspect, the two ends of the first guide chute are respectively a first end and a second end, and the first guide chute extends from the first end to the second end in a direction close to the base . The two ends of the second guide chute are respectively the third end and the fourth end, and the second guide chute extends from the third end to the fourth end toward the direction close to the base. When the first connecting member rotates from the unfolded position to the folded position, the first sliding member moves from the first end of the first guide chute and the third end of the second guide chute to the second end of the first guide chute and the third end of the second guide chute. The fourth end of the second guide chute slides. In this way, the smoothness of the first connecting member turning from the unfolded position to the folded position is better, and the unfolding and folding of the electronic device is less difficult.

In a possible implementation manner of the first aspect, the second guide chute extends from the third end to the fourth end in a direction away from the plane where the fitting surface of the first housing is located. That is, the vertical distance from different parts of the third end to the fourth end of the second guide chute to the plane where the abutment surface of the first housing is located gradually increases. In this way, during the rotation of the first connecting part from the unfolded position to the folded position, the second guide chute can be used to push the first sliding part to gradually move away from the folding screen, thereby driving the end of the first door panel close to the base, and relatively The end of the first door panel close to the first connecting piece is gradually inclined in a direction away from the folding screen. This gradually turns to the folded position. This structure is simple, and the driving force applied to the first casing can be directly transmitted to the first sliding member for pushing the first door panel to tilt, so the folding driving force of the electronic device is relatively strong, and the probability of jamming is low .

In a possible implementation manner of the first aspect, the second guide chute is an arc-shaped chute, and an extension path of the second guide chute is arched toward a direction close to the fitting surface of the first door panel. In this way, during the rotation of the first connecting member from the unfolded position to the folded position, the inclination angle of the first door panel can be controlled to change smoothly through the second guide chute, thereby increasing the folding stability of the electronic device and reducing the possibility of jamming. probability.

In a possible implementation manner of the first aspect, the first guide chute is an arc-shaped chute, and an extension path of the first guide chute is arched away from the fitting surface of the first door panel. In this way, during the rotation of the first connecting member from the unfolded position to the folded position, through the cooperation of the second guide chute with the first guide chute, the inclination angle of the first door panel can be controlled to change smoothly and be stressed stably, thereby further Increase the folding stability of electronic equipment and reduce the probability of jamming.

In a possible implementation manner of the first aspect, the length ranges of the first guide chute and the second guide chute along their extension paths are both [3.5 mm, 10 mm]. Further optionally, the length ranges of the first guide chute and the second guide chute along their extension paths are both [3.5 mm, 5 mm].

In a possible implementation manner of the first aspect, the curvature radius ranges of the first guide chute and the second guide chute at each position on their own extension paths are both [3 mm, 7 mm]. Further optionally, the radius of curvature interval ranges of the first guide chute and the second guide chute at each position on their own extension paths are [4mm, 5.5mm].

In a possible implementation manner of the first aspect, the hinge axis between the first connecting member and the first door panel is the second hinge axis. The angle between the vertical line from the second end of the first guide chute to the second hinge axis and the vertical line from the fourth end of the second guide chute to the second hinge axis when the first link is in the unfolded position is γ, the γ=90°-α=β-180°.

In a possible implementation manner of the first aspect, the base is provided with a first hinged groove, and a first arc-shaped rib is arranged in the first hinged groove. The first door panel is provided with a first hinge block, and the first hinge block is provided with a first arc-shaped long groove. The first hinge block is matched and accommodated in the first hinge groove, and the first arc-shaped rib is matched and embedded in the first arc-shaped long groove. In this way, the hinge between the base and the first door panel is realized.

In a possible implementation manner of the first aspect, the first door panel is provided with a second hinge block, and the second hinge block is provided with a second arc-shaped long groove. The first connecting piece is provided with a second hinge groove, and a second arc-shaped rib is arranged in the second hinge groove. The second hinge block is matched and accommodated in the second hinge groove, and the second arc-shaped rib is matched and accommodated in the second arc-shaped long groove. Thus, the hinge between the first connecting piece and the first door panel is realized.

In a possible implementation manner of the first aspect, the rotating mechanism further includes a second door panel, a second connecting piece, and a second swing arm. The second door panel is hinged on the base, the second connecting piece is hinged on the second door panel, and the second connecting piece is used for fixing with the second casing. A third guide chute is arranged on the second door panel. A fourth guide chute is arranged on the second connecting piece. One end of the second swing arm is hinged on the base, and the other end of the second swing arm is provided with a second sliding part, and the second sliding part is slidably connected in the third guide chute and the fourth guide chute. Both the second door panel and the second housing have a fitting surface, and the fitting surface is used for fitting the folding screen. The second link can rotate between an unfolded position and a folded position relative to the base. When the second connecting member is in the unfolded position, the fitting surface of the base, the fitting surface of the second door panel and the fitting surface of the second housing are coplanar and have the same orientation. When the second connecting member is in the folded position, the angle between the fitting surface of the base and the fitting surface of the second door panel on the side for fitting the folding screen is less than 90°, and the fitting surface of the second door panel and the fitting surface The angle between the fitting surfaces of the second housing on the side for fitting the folding screen is greater than 180°, and the fitting surface of the second casing is perpendicular or approximately perpendicular to the fitting surface of the base. In this way, when the supporting device is in the folded state, the part of the folding screen supported on the rotating mechanism (that is, the third part described below) can be in the shape of a water drop, so that the inner folding angle of the folding screen can be improved, and the folding screen can be extended. service life.

In the second aspect, some embodiments of the present application provide a supporting device, the supporting device includes a first housing, a second housing, and the rotating mechanism described in any technical solution above, and the rotating mechanism is located between the first housing and the second housing. Between the housings, the first connecting piece of the rotating mechanism is fixed to the first housing, and the base of the rotating mechanism is also connected to the second housing.

Since the supporting device provided in the embodiment of the present application includes the rotating mechanism described in any one of the above technical solutions, both can solve the same technical problem and achieve the same effect.

In a third aspect, some embodiments of the present application provide an electronic device, where the electronic device includes a folding screen and the supporting device described in the above technical solution. The folding screen includes a first part, a second part and a bending part, the bending part is located between the first part and the second part, and the first part is supported and fixed on the first shell, and the second part is supported and fixed on the second shell On the body, the bending part is supported on the rotating mechanism of the supporting device.

Since the electronic device provided by the embodiment of the present application includes the supporting device described in the above technical solution, both can solve the same technical problem and achieve the same effect.

Description of drawings

FIG. 1 is a perspective view of an electronic device provided by some embodiments of the present application;

FIG. 2 is a schematic structural diagram of the electronic device shown in FIG. 1 when the folding screen is in an unfolded state;

FIG. 3 is a schematic structural diagram of the electronic device shown in FIG. 1 when the folding screen is in a folded state;

Fig. 4 is a perspective view of the supporting device in the electronic device shown in Fig. 1;

Fig. 5 is a partial exploded view of the supporting device shown in Fig. 4;

Fig. 6 is a schematic diagram of the assembly structure of the first middle frame, the rotation mechanism and the second middle frame in the support device provided by some embodiments of the present application;

Fig. 7 is a schematic diagram of the assembly structure of the first middle frame, the base, the first door panel, the first connecting piece and the first swing arm in the assembly structure shown in Fig. 6;

Fig. 8 is an exploded view of the assembly structure shown in Fig. 7;

Fig. 9 is a structural schematic diagram of the base in the assembly structure shown in Fig. 7;

Fig. 10 is a structural schematic diagram of the first door panel in the assembly structure shown in Fig. 7;

Fig. 11 is a structural schematic diagram of the first door panel shown in Fig. 10 under another viewing angle;

Fig. 12 is an assembly diagram of the first middle frame and the first connector in the assembly structure shown in Fig. 7;

Fig. 13 is a partial enlarged view of area I in the assembly diagram shown in Fig. 12;

Fig. 14 is a cross-sectional view of the assembly structure shown in Fig. 7 at line A-A;

Fig. 15 is a schematic structural view of the structure shown in Fig. 14 when the first connecting member is in the unfolded position;

Fig. 16 is a schematic structural view of the structure shown in Fig. 14 when the first connecting member is in a folded position;

Fig. 17 is a structural schematic diagram of the first swing arm in the assembly structure shown in Fig. 7;

Fig. 18 is a structural schematic diagram of the assembly structure shown in Fig. 7 under another viewing angle;

Fig. 19 is a partially enlarged view of area II in Fig. 18;

Figure 20 shows the fit of the first sliding part, the first guide chute, the second guide chute, the fitting surface of the base, the fitting surface of the first door panel and the first middle frame when the first connecting part is in the unfolded position Schematic diagram of the relative position of the plane;

Figure 21 shows the bonding of the first sliding part, the first guide chute, the second guide chute, the bonding surface of the base, the bonding surface of the first door panel and the first middle frame when the first connecting part is in the folded position Schematic diagram of the relative position of the plane;

Fig. 22 is a relationship diagram between the first guide chute, the second guide chute and the second hinge axis when the first connecting member is in the deployed position;

Fig. 23 is a structural schematic diagram of the assembly structure shown in Fig. 6 and the folding screen in an unfolded state;

FIG. 24 is a structural schematic diagram of the assembly structure shown in FIG. 6 and the folding screen in a folded state.

detailed description

In this embodiment of the application, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly indicating the indicated The number of technical characteristics. Thus, a feature defined as "first", "second", "third" and "fourth" may expressly or implicitly include one or more of such features.

In the embodiments of the present application, the term "comprising", "comprising" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes Including other elements not expressly listed, or also including elements inherent in such process, method, article or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

The present application provides an electronic device, which is a type of electronic device with a folding screen. Specifically, the electronic device includes, but is not limited to, a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a personal computer, a notebook computer (notebook), a vehicle-mounted device and wearable devices (such as watches) and other electronic devices.

Please refer to FIG. 1 . FIG. 1 is a perspective view of an electronic device 100 provided by some embodiments of the present application. In this embodiment, the electronic device 100 is a folding screen mobile phone. The electronic device 100 includes a folding screen 10 and a supporting device 20 . It can be understood that FIG. 1 only schematically shows some components included in the electronic device 100 , and the actual shape, actual size, actual position and actual configuration of these components are not limited by FIG. 1 .

The folding screen 10 is used to display images, videos and the like. The folding screen 10 can be folded into a first part 11 and a second part 12 . The folding screen 10 also includes a third part 13 located between the first part 11 and the second part 12 . At least the third part 13 of the folding screen 10 is made of flexible material. The first part 11 and the second part 12 can be made of flexible materials, can also be made of rigid materials, and can also be made of partly rigid materials and partly made of flexible materials, which are not specifically limited here.

Specifically, the folding screen 10 may be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (micro organic light-emitting diode) screen, a quantum dot light-emitting diode (quantum dot light emitting diodes, QLED) screen , liquid crystal display (liquid crystal display, LCD) and so on.

The folding screen 10 can be folded between an unfolded state and a folded state.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of the electronic device 100 shown in FIG. 1 when the folding screen 10 is in an unfolded state. When the folding screen 10 is in the unfolded state, the first part 11 , the second part 12 and the third part 13 are coplanar and have the same orientation. In this state, large-screen display can be realized, which can provide users with richer information and bring users a better experience.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of the electronic device 100 shown in FIG. 1 when the folding screen 10 is in a folded state. When the folding screen 10 is in the folded state, the third part 13 is in the bent state, and the first part (not shown in FIG. 3 ) is opposite to the second part (not shown in FIG. 3 ). The folding screen 10 is invisible to the user, and the supporting device 20 is protected outside the folding screen 10 to prevent the folding screen 10 from being scratched by hard objects.

The supporting device 20 is used to support the folding screen 10 and allow the folding screen 10 to be folded between an unfolded state and a folded state. Please refer to FIG. 4 , which is a perspective view of the supporting device 20 in the electronic device 100 shown in FIG. 1 . In this embodiment, the supporting device 20 includes a first housing 21 , a second housing 22 and a rotating mechanism 23 . It can be understood that FIG. 4 only schematically shows some components included in the support device 20 , and the actual shape, actual size, actual position and actual configuration of these components are not limited by FIG. 4 .

The first housing 21 is used to fix and support the first part 11 of the folding screen 10 in FIG. 1 . Specifically, the first casing 21 has a fitting surface M1, and the first casing 21 is used to fix and support the first part 11 of the folding screen 10 in FIG. 1 through the fitting surface M1.

The second housing 22 is used to fix and support the second part 12 of the folding screen 10 in FIG. 1 . Specifically, the second casing 22 has a fitting surface M2, and the second casing 22 is used to fix and support the second part 12 of the folding screen 10 in FIG. 1 through the fitting surface M2.

The inside of the first housing 21 forms a first receiving cavity (not shown in the figure). The inside of the second housing 22 forms a second receiving cavity (not shown in the figure). The first accommodating chamber and the second accommodating chamber are used for accommodating electronic components such as a motherboard, a battery, a camera module, a speaker, and an earpiece of the electronic device 100 .

The first housing 21 can be a structural whole, or can be formed by assembling a plurality of parts. Similarly, the second housing 22 can be a whole structural member, or can be formed by assembling multiple parts.

In some embodiments, please refer to FIG. 5 , which is an exploded view of the supporting device 20 shown in FIG. 4 . The first casing 21 includes a first middle frame 211 and a first back cover 212 . The bonding surface M1 is located on the first middle frame 211 . The first back cover 212 is fixed on a side of the first middle frame 211 away from the bonding surface M1. The first receiving cavity is formed between the first middle frame 211 and the first back cover 212 .

The second casing 22 includes a second middle frame 221 and a second back cover 222 . The bonding surface M2 is located on the second middle frame 221 . The second back cover 222 is fixed on a side of the second middle frame 221 away from the bonding surface M2. The second receiving cavity is formed between the second middle frame 221 and the second back cover 222 .

The rotating mechanism 23 is used to support the third part 13 of the folding screen 10 . Moreover, the rotation mechanism 23 is connected between the first housing 21 and the second housing 22 , and the first housing 21 and the second housing 22 are rotatably connected through the rotation mechanism 23 . In some embodiments, the rotating mechanism 23 is connected between the first middle frame 211 of the first casing 21 and the second middle frame 221 of the second casing 22 . In other embodiments, the rotating mechanism 23 may also be connected between the first back cover 212 of the first casing 21 and the second back cover 222 of the second casing 22 .

The number of the rotating mechanism 23 can be one, or two or more. Fig. 4 and Fig. 5 only give an example in which the number of rotating mechanisms 23 is two, which should not be regarded as a special limitation to the present application. The two rotating mechanisms 23 are arranged at intervals along the length direction of the folding axis of the folding screen 10 .

Please refer to FIG. 6 . FIG. 6 is a schematic diagram of the assembly structure of the first middle frame 211 , the rotating mechanism 23 and the second middle frame 221 in the support device 20 provided by some embodiments of the present application. In this embodiment, the rotating mechanism 23 includes a base 231 , a first door panel 232 , a first connecting member Q1 and a first swing arm 233 . It can be understood that FIG. 6 only schematically shows some components included in the rotating mechanism 23 , and the actual shape, actual size, actual position and actual configuration of these components are not limited by FIG. 6 .

Please refer to Figure 7 and Figure 8, Figure 7 is a schematic diagram of the assembly structure of the first middle frame 211, the base 231, the first door panel 232, the first connecting piece Q1 and the first swing arm 233 in the assembly structure shown in Figure 6, Figure 8 It is an exploded view of the assembly structure shown in Fig. 7 . The first door panel 232 is hinged on the base 231 .

In some embodiments, please refer to FIG. 9 , which is a schematic structural diagram of the base 231 in the assembly structure shown in FIG. 7 . In this embodiment, the base 231 is provided with a first hinge slot 2311 . The inner wall of the first hinge groove 2311 is provided with a first arc-shaped rib 2312 . The extension path of the first arc-shaped rib 2312 can be a superior arc (that is, an arc with a central angle greater than 180°), or a inferior arc (that is, an arc with a central angle that is less than 180°), or a semicircular arc (that is, an arc with a central angle equal to 180°), which is not specifically limited here. In the embodiment shown in FIG. 9 , the extending path of the first arc-shaped rib 2312 is a minor arc. In some embodiments, the number of the first arc-shaped ribs 2312 is two, and the two first arc-shaped ribs 2312 are respectively arranged on two opposite inner walls of the first hinge groove 2311, and the two first The center lines of the arc-shaped ribs 2312 are collinear. In other embodiments, the number of the first arc-shaped rib 2312 may also be one. The base 231 is also provided with a hinge shaft 2313 , and the hinge shaft 2313 is parallel to the center line of the first arc-shaped rib 2312 .

Please refer to FIG. 10 , which is a schematic structural diagram of the first door panel 232 in the assembly structure shown in FIG. 7 . In this embodiment, a first hinge block 2321 is disposed on the first door panel 232 . The first hinge block 2321 can be fixed on the first door panel 232 by gluing, or integrally formed with the first door panel 232 , that is, the first hinge block 2321 and the first door panel 232 are integrally formed as a structural member. The first hinge block 2321 is provided with a first arc-shaped slot 2322 . In some embodiments, the number of the first arc-shaped long slots 2322 is two, and the two first arc-shaped long slots 2322 are respectively arranged on the two opposite side walls of the first hinge block 2321, and the two first The center lines of the arc-shaped slots 2322 are collinear. In other embodiments, the number of the first arc-shaped long slot 2322 may also be one.

The first hinge block 2321 in FIG. 10 fits and accommodates in the first hinge groove 2311 in FIG. 9 , and can rotate around the center line of the first arc-shaped rib 2312 in the first hinge groove 2311 . The two first arc-shaped ribs 2312 in FIG. 9 are fit and accommodated in the two first arc-shaped long grooves 2322 in FIG. 10 . Thus, the hinge connection between the first door panel 232 and the base 231 is realized. This structure is simple and easy to implement.

In the above embodiment, the first arc-shaped long groove 2322 can also be arranged on the inner wall of the first hinge groove 2311, and the first arc-shaped rib 2312 can also be arranged on the first hinge block 2321, which will not be described in detail here. limited.

The first connecting member Q1 is hinged on the first door panel 232 .

In some embodiments, please refer to FIG. 11 , which is a schematic structural diagram of the first door panel 232 shown in FIG. 10 at another viewing angle. In this embodiment, the first door panel 232 is provided with a second hinge block 2323 . The second hinge block 2323 can be fixed on the first door panel 232 by gluing, or integrally formed with the first door panel 232 , that is, the second hinge block 2323 and the first door panel 232 are integrally formed as a structural member. The second hinge block 2323 is provided with a second arc-shaped slot 2324 . The first door panel 232 is also provided with a first guiding slide groove C1.

Please refer to FIG. 12 . FIG. 12 is a schematic diagram of the assembly structure of the first connecting part Q1 and the first middle frame 211 in the assembly structure shown in FIG. Please refer to FIG. 13 . FIG. 13 is a partial enlarged view of area I in the assembly drawing shown in FIG. 12 . In this embodiment, a second hinge slot 2111 is disposed on the first connecting member Q1. A second arc-shaped rib 2112 is disposed in the second hinge groove 2111 .

The second hinge block 2323 in FIG. 11 fits and accommodates in the second hinge groove 2111 in FIG. 13 , and can rotate around the center line of the second arc-shaped long groove 2324 in the second hinge groove 2111 . The second arc-shaped rib 2112 in FIG. 13 is fitly accommodated in the second arc-shaped long groove 2324 in FIG. 11 . Thus, the hinge connection between the first connecting member Q1 and the first door panel 232 is realized. This structure is simple and easy to implement.

The first connecting member Q1 is fixed to the first middle frame 211 . Specifically, the first connecting member Q1 may be fixed to the first middle frame 211 by means of threaded connection, riveting, bonding, etc., or may be integrally formed with the first middle frame 211 .

Please refer to FIG. 14 . FIG. 14 is a cross-sectional view of the assembly structure shown in FIG. 7 at line A-A. The hinge axis between the first door panel 232 and the base 231 is the first hinge axis L1, and the hinge axis between the first connecting member Q1 and the first door panel 232 is the second hinge axis L2. The first hinge axis L1 is arranged parallel to the second hinge axis L2. Both the base 231 and the first door panel 232 have bonding surfaces. Specifically, the first door panel 232 has a fitting surface M2, and the base 231 has a fitting surface M3. The bonding surface M2 and the bonding surface M3 are used for bonding the third part 13 of the folding screen 10 .

Around the first hinge axis L1 and the second hinge axis L2, the first connecting member Q1 can rotate between an unfolded position and a folded position relative to the base 231 .

Specifically, please refer to FIG. 15 . FIG. 15 is a schematic structural diagram of the structure shown in FIG. 14 when the first connecting member Q1 is in the unfolded position. In this position, the fitting surface M1, the fitting surface M2, and the fitting surface M3 are coplanarly arranged. Moreover, the bonding surface M1, the bonding surface M2, and the bonding surface M3 have the same orientation. This position is the position of the first connecting member Q1 relative to the base 231 and the first door panel 232 when the folding screen 10 is in an unfolded state.

Please refer to FIG. 16 , which is a schematic structural view of the structure shown in FIG. 14 when the first connecting member Q1 is in a folded position. In this position, the fitting surface M1 is perpendicular to the fitting surface M3. This position is the position of the first connecting member Q1 relative to the base 231 when the folding screen 10 is in the folded state.

In some embodiments, please refer to FIG. 14-FIG. 16 , the first hinge axis L1 is located on the side facing the fitting surface M3 , and the first hinge axis L1 is spaced apart from the fitting surface M3 . In this way, when the first connecting part Q1 rotates from the unfolded position to the folded position, the base 231 can be sunk to avoid the folding screen 10 , so that the folding screen 10 has a larger inward chamfer angle, which can prolong the service life of the folding screen 10 . When the first connecting part Q1 rotates from the folded position to the unfolded position, the base 231 can be lifted so that the bonding surface M3 of the base 231 is flush with the bonding surface M1 and the bonding surface M2 to ensure the flatness of the folding screen 10 .

In some embodiments, please continue to refer to FIGS. 14-16 , the second hinge axis L2 coincides with the edge of the fitting surface M2 close to the fitting surface M1 (that is, the second edge b described below). In this way, when the first connecting part Q1 moves between the unfolded position and the folded position, the relative position between the edge of the fitting surface M2 close to the fitting surface M1 and the fitting surface M1 is fixed, and the folding screen 10 will not be damaged, thereby extending the The service life of the folding screen 10 is extended.

The first swing arm 233 is used to control the movement state of the first door panel 232 when the first connecting part Q1 rotates between the unfolded position and the folded position, so that when the first connecting part Q1 is in the folded position, please refer to FIG. The included angle between the fitting surface M2 and the fitting surface M3 on one side for fitting the folding screen 10 is α, and the α is less than 90°, and the angle between the fitting surface M2 and the fitting surface M1 is used for fitting and folding The included angle between one side of the screen 10 is β, which is larger than 180°, and the bonding surface M1 is perpendicular or nearly perpendicular to the bonding surface M3. Wherein, α+β is approximately equal to 270°. In this way, the folding screens attached to the bonding surface M1, the bonding surface M3 and the bonding surface M2 can be folded into a water drop shape, so as to increase the inner folding angle (R angle) of the folding screen 10 and prolong the use of the folding screen 10 life. Wherein, optionally, 65°≤α≤82°. In this way, the included angle α is moderate, which can increase the R angle of the bending area of the folding screen 10 and effectively prolong the service life of the folding screen 10 .

In order to achieve the above purpose, specifically, one end of the first swing arm 233 is hinged on the base 231 . In some embodiments, please refer to FIG. 17 , which is a schematic structural diagram of the first swing arm 233 in the assembly structure shown in FIG. 7 . One end of the first swing arm 233 defines a hinge hole 2331 . The first swing arm 233 is hinged to the hinge shaft 2313 (see FIG. 9 ) of the base 231 through the hinge hole 2331 . The other end of the first swing arm 233 is provided with a first sliding member 234 . In some embodiments, the first sliding member 234 is a pin shaft. In other embodiments, the first sliding member 234 can also be a roller. The first sliding member 234 is interference fit in the installation hole 2332 of the first swing arm 233 . Please refer to FIG. 18 and FIG. 19 , FIG. 18 is a structural schematic view of the assembly structure shown in FIG. 7 from another perspective, and FIG. 19 is a partially enlarged view of area II in FIG. 18 . The first sliding part 234 is slidably connected to the first guiding slot C1 of the first door panel 232 and the second guiding slot C2 of the first connecting part Q1 .

When the first connecting part Q1 rotates between the unfolded position and the folded position relative to the base 231, the first sliding part 234 can be pushed through the second guiding chute C2, so that the first sliding part 234 moves along the first guiding chute C1. Sliding with the second guide chute C2, thereby driving the first door panel 232 to move together with the first connecting member Q1. Thus, the purpose of controlling the movement state of the first door panel 232 is achieved.

Please refer to Figure 20 and Figure 21, Figure 20 shows the first sliding member 234, the first guide chute C1, the second guide chute C2, the fitting surface M3, and the fitting surface M2 when the first connecting part Q1 is in the deployed position Schematic diagram of the relative position with the fitting surface M1; FIG. 21 shows the first sliding member 234, the first guide chute C1, the second guide chute C2, the fitting surface M3, and the fitting surface when the first connector Q1 is in the folded position. Schematic diagram of the relative positions of the surface M2 and the bonding surface M1. In this embodiment, the first guide chute C1 and the second guide chute C2 are located on a side of the plane where the bonding surface M2 is located away from the folding screen 10 . The orthographic projection of the first guide chute C1 on the bonding surface M2 is the first projection K1. The orthographic projection of the second guide chute C2 on the bonding surface M2 is the second projection K2. The edge of the fitting surface M2 close to the fitting surface M3 is the first edge a, and the edge of the fitting surface M2 close to the fitting surface M1 is the second edge b. The first projection K1 and the second projection K2 are located between the straight line on which the first edge a lies and the straight line on which the second edge b lies. In this way, the structure of the rotating mechanism 23 is simple and the volume is small. And the first guide chute C1 and the second guide chute C2 will not interfere with the folding screen 10 .

On the basis of the above embodiments, optionally, please continue to refer to FIG. 20 and FIG. 21 , the two ends of the first guide chute C1 are the first end A1 and the second end A2 respectively. The first guiding chute C1 extends from the first end A1 to the second end A2 in a direction close to the base 231 . Two ends of the second guide chute C2 are respectively a third end B1 and a fourth end B2. The second guiding chute C2 extends toward the base 231 from the third end B1 to the fourth end B2 . When the first link Q1 rotates from the unfolded position to the folded position, the first sliding member 234 moves toward the first guide slide from the first end A1 of the first guide chute C1 and the third end B1 of the second guide chute C2. The second end A2 of the slot C1 slides with the fourth end B2 of the second guide slot C2. In this way, the smoothness when the first connecting member Q1 rotates from the unfolded position to the folded position is better, and the unfolding and folding of the electronic device is less difficult.

On the basis of the above embodiments, optionally, please refer to FIG. 20 and FIG. 21 , the second guide chute C2 extends from the third end B1 to the fourth end B2 in a direction away from the plane where the adhering surface M1 is located. That is, when the second guide chute C2 slides from the third end B1 to the fourth end B2, the vertical distance from the plane where the adhering surface M1 is located increases. In this way, please refer to FIG. 20 , when the first connecting part Q1 rotates from the unfolded position along the direction a1 to the folded position, the first sliding part 234 can be pushed away from the folding screen 10 through the second guide chute C2 (also That is, the direction a2) gradually moves, thereby driving the end of the first door panel 232 close to the base 231, and gradually moving away from the folding screen 10 (that is, the direction a3) relative to the end of the first door panel 232 close to the first connecting member Q1. tilt. This gradually turns to the folded position. This structure is simple, and the driving force applied to the first middle frame 211 can be directly transmitted to the first sliding member 234 for pushing the first door panel 232 to tilt and move, so the folding driving force of the electronic device 100 is strong and jamming occurs low probability.

In the above embodiment, the second guide chute C2 may extend in a straight line or in an arc, which is not specifically limited here. In the embodiment shown in FIG. 20 and FIG. 21 , the second guide chute C2 is an arc-shaped chute. That is, the second guide chute C2 extends along an arc. The extension path of the second guide chute C2 is arched towards the direction close to the adhering surface M2. In this way, when the first link Q1 rotates from the unfolded position to the folded position along the direction a1, the inclination angle of the first door panel 232 can be controlled to change smoothly through the second guide chute C2, thereby increasing the folding stability of the electronic device 100 performance, reducing the probability of stuck.

On the basis of the above embodiments, the first guide chute C1 may extend in a straight line or in an arc, which is not specifically limited here. Optionally, please refer to FIG. 20 and FIG. 21 , the first guide chute C1 is an arc-shaped chute. That is, the first guide chute C1 also extends along an arc. The extension path of the first guide chute C1 arches away from the bonding surface M2. In this way, when the first link Q1 rotates from the unfolded position to the folded position along the direction a1, the inclination angle of the first door panel 232 can be controlled to change smoothly through the cooperation of the second guide chute C2 and the first guide chute C1. And the force is stable, so as to further increase the folding stability of the electronic device 100 and reduce the probability of jamming.

In some embodiments, please refer to FIG. 22 . FIG. 22 is a relationship diagram between the first guide slot C1 , the second guide slot C2 and the second hinge axis L2 when the first connecting member Q1 is in the unfolded position. The length of the first guide chute C1 along its own extension path is d1, and the length of the second guide chute C2 along its own extension path is d2. The ranges of d1 and d2 are both [3.5mm, 10mm]. Further optionally, the ranges of d1 and d2 are both [3.5mm, 5mm].

In some embodiments, please continue to refer to FIG. 22 , the radius of curvature of each position of the first guide chute C1 on its own extension path is R1, and the curvature radius of each position of the second guide chute C2 on its own extension path is R2, R1 The ranges of R2 and R2 are both [3mm, 7mm]. Further optionally, the ranges of R1 and R2 are both [4mm, 5.5mm].

In some embodiments, when the first connecting member Q1 is in the unfolded position, please continue to refer to FIG. 22 , between the perpendicular line from the second end A2 to the second hinge axis L2 and the perpendicular line from the fourth end B2 to the second hinge axis L2 The angle between them is γ. This γ=90°-α=β-180°. Among them, α and β refer to Figure 16.

Referring back to FIG. 6 , the rotating mechanism 23 further includes a second door panel 235 , a second connecting member Q2 and a second swing arm 236 . The second door panel 235 is located between the base 231 and the second connecting member Q2. And the second door panel 235 is hinged on the base 231 . The second connecting member Q2 is hinged on the second door panel 235 . The second connecting member Q2 is fixed to the second middle frame 221 . The second door panel 235 has a fitting surface for fitting the folding screen 10 . The second door panel 235 is provided with a third guiding chute. A fourth guide chute is provided on the second connecting member Q2. One end of the second swing arm 236 is hinged on the base 231 , and the other end of the second swing arm 236 is provided with a second sliding member, and the second sliding member is slidably connected in the third guide chute and the fourth guide chute. The second connecting member Q2 can rotate between an unfolded position and a folded position relative to the base 231 . When the second connecting member Q2 is in the unfolded position, the bonding surface of the base 231 , the bonding surface of the second door panel 235 and the bonding surface of the second middle frame 221 are coplanar and have the same orientation. When the second connecting part Q2 is in the folded position, the angle between the bonding surface of the base 231 and the bonding surface of the second door panel 235 on the side for bonding the folding screen 10 is less than 90°, and the second The angle between the fitting surface of the door panel 235 and the fitting surface of the second middle frame 221 on the side for fitting the folding screen 10 is greater than 180°, and the fitting surface of the second middle frame 221 and the side of the base 231 The mating surface is vertical or nearly vertical. Specifically, the structural forms, assembly and movement modes of the second door panel 235, the second connecting piece Q2, the second swing arm 236, the third guide chute, the fourth guide chute and the second slider are respectively the same as those of the first door panel. 232 , the first connecting piece Q1 , the first swing arm 233 , the first guiding chute C1 , the second guiding chute C2 , and the first sliding piece 234 have the same structure, assembly and movement, and will not be repeated here. In this way, the supporting device 20 can fold the third part 13 of the folding screen 10 into a drop shape, and the inner folding angle (R angle) of the third part 13 is relatively large, so the service life of the folding screen 10 is longer.

Please refer to FIG. 23 . FIG. 23 is a structural schematic diagram of the assembly structure shown in FIG. 6 and the folding screen 10 in an unfolded state. In this state, the bonding surface of the first middle frame 211, the bonding surface of the first door panel 232, the bonding surface of the base 231, the bonding surface of the second door panel 235, and the bonding surface of the second middle frame 221 share the same surface settings. The first part 11 of the folding screen 10 is supported and fixed on the bonding surface of the first middle frame 211 . The second part 12 of the folding screen 10 is supported and fixed on the bonding surface of the second middle frame 221 . The third part 13 of the folding screen 10 is supported and fixed on the bonding surface of the first door panel 232 and the bonding surface of the second door panel 235 . The third part 13 of the folding screen 10 is also supported on the bonding surface of the base 231 .

Please refer to FIG. 24 . FIG. 24 is a structural schematic diagram of the assembly structure shown in FIG. 6 and the folding screen 10 in a folded state. In this state, the bonding surface of the first middle frame 211 is opposite to the bonding surface of the second middle frame 221 . Both the bonding surface of the first middle frame 211 and the bonding surface of the second middle frame 221 are perpendicular to the bonding surface of the base 231 . The bonding surface of the first door panel 232 is inclined in a direction away from the folding screen 10 from an end close to the bonding surface of the first middle frame 211 to an end close to the bonding surface of the base 231 . The bonding surface of the second door panel 235 is inclined in a direction away from the folding screen 10 from an end close to the bonding surface of the second middle frame 221 to an end close to the bonding surface of the base 231 . The first part 11 of the folding screen 10 is supported and fixed on the bonding surface of the first middle frame 211 . The second part 12 of the folding screen 10 is supported and fixed on the bonding surface of the second middle frame 221 . The third part 13 of the folding screen 10 is supported and fixed on the bonding surface of the first door panel 232 and the bonding surface of the second door panel 235 . And the third part 13 of the folding screen 10 is in the shape of a water drop. The inner folding angle (R angle) of the third portion 13 is larger, so the life of the folding screen 10 is longer.

In the embodiment of the present application, it is worth noting that the rotating mechanism 23 may not include the second door panel 233, the second connecting piece Q1, the third guide chute, the fourth guide chute and the second swing arm 236, but directly The second casing 22 is fixed on the base 231 , and the bonding surface of the second casing 22 is perpendicular or approximately perpendicular to the bonding surface M3 of the base 231 , so as to realize 90° folding.

Since the supporting device 20 provided in the embodiment of the present application includes the rotating mechanism 23 described in any of the above embodiments, the two can solve the same technical problem and achieve the same effect.

Since the electronic device 100 provided in the embodiment of the present application includes the supporting device 20 described in any one of the above embodiments, the two can solve the same technical problem and achieve the same effect.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims (14)

1. A rotating mechanism (23) is characterized by comprising a base (231), a first door panel (232), a first connecting piece (Q1) and a first swing arm (233);

the first door panel (232) is hinged to the base (231), the first connecting piece (Q1) is hinged to the first door panel (232), and the first connecting piece (Q1) is used for being fixed with the first shell (21);

a first guide sliding groove (C1) is formed in the first door panel (232), a second guide sliding groove (C2) is formed in the first connecting piece (Q1), one end of the first swing arm (233) is hinged to the base (231), a first sliding piece (234) is arranged at the other end of the first swing arm (233), and the first sliding piece (234) is connected into the first guide sliding groove (C1) and the second guide sliding groove (C2) in a sliding mode;

the base (231), the first door panel (232) and the first shell (21) are provided with binding surfaces, and the binding surfaces are used for binding the folding screen (10);

the first link (Q1) is rotatable relative to the base (231) between an unfolded position and a folded position; when the first connecting piece (Q1) is in the unfolding position, the abutting surface of the base (231), the abutting surface of the first door panel (232) and the abutting surface of the first shell (21) are arranged in a coplanar mode and face the same direction; when the first connecting piece (Q1) is located at the folding position, an included angle between the binding surface of the base (231) and the binding surface of the first door panel (232) at one side for binding the folding screen (10) is smaller than 90 degrees, an included angle between the binding surface of the first door panel (232) and the binding surface of the first shell (21) at one side for binding the folding screen (10) is larger than 180 degrees, and the binding surface of the first shell (21) is perpendicular to the binding surface of the base (231);

the first guide chute (C1) and the second guide chute (C2) are positioned on one side, away from the folding screen (10), of the binding surface of the first door panel (232);

an orthographic projection of the first guide chute (C1) on an attaching surface of the first door panel (232) is a first projection (K1), an orthographic projection of the second guide chute (C2) on an attaching surface of the first door panel (232) is a second projection (K2), an edge of the attaching surface of the first door panel (232) close to the attaching surface of the base (231) is a first edge (a), an edge of the attaching surface of the first door panel (232) close to the attaching surface of the first housing (21) is a second edge (b), and the first projection (K1) and the second projection (K2) are located between a straight line where the first edge (a) is located and a straight line where the second edge (b) is located;

two ends of the first guide chute (C1) are respectively a first end (A1) and a second end (A2), and the first guide chute (C1) extends from the first end (A1) to the second end (A2) to a direction close to the base (231);

the two ends of the second guide chute (C2) are respectively a third end (B1) and a fourth end (B2), and the second guide chute (C2) extends from the third end (B1) to the fourth end (B2) to the direction close to the base (231);

when the first connecting piece (Q1) rotates from the unfolded position to the folded position, the first sliding piece (234) slides from the first end (A1) of the first guide chute (C1) and the third end (B1) of the second guide chute (C2) to the second end (A2) of the first guide chute (C1) and the fourth end (B2) of the second guide chute (C2).

2. The rotating mechanism (23) according to claim 1, wherein the second guide runner (C2) extends from the third end (B1) to the fourth end (B2) in a direction away from the plane in which the abutment surface of the first housing (21) lies.

3. The rotating mechanism (23) according to claim 2, wherein the second guide chute (C2) is an arc chute, and an extension path of the second guide chute (C2) is arched in a direction approaching the abutting surface of the first door panel (232).

4. The turning mechanism (23) according to claim 3, characterized in that the first guiding chute (C1) is an arc chute, the extension path of the first guiding chute (C1) being arched in a direction away from the abutment surface of the first door panel (232).

5. The rotation mechanism (23) according to claim 4, wherein the length intervals of the first guide chute (C1) and the second guide chute (C2) along the extension path thereof are each [3.5mm,10mm ].

6. The rotation mechanism (23) according to claim 4, wherein the first guide chute (C1) and the second guide chute (C2) have a radius of curvature ranging [3mm,7mm ] at each position along their own path.

7. The rotating mechanism (23) according to any one of claims 1 to 6, wherein an angle between an abutting surface of the base (231) and an abutting surface of the first door panel (232) on a side for abutting the folding screen (10) is greater than or equal to 65 ° and less than or equal to 82 ° when the first connector (Q1) is in the folded position.

8. The rotating mechanism (23) according to any one of claims 1-6, wherein the base (231) is provided with a first hinge slot (2311), and a first circular-arc-shaped rib (2312) is arranged in the first hinge slot (2311);

the first door panel (232) is provided with a first hinging block (2321), and the first hinging block (2321) is provided with a first arc-shaped long groove (2322);

the first hinge block (2321) is accommodated in the first hinge groove (2311) in a matching mode, and the first circular arc rib (2312) is embedded in the first circular arc long groove (2322) in a matching mode.

9. The rotating mechanism (23) according to any one of claims 1 to 6, wherein the first door panel (232) is provided with a second hinge block (2323), and the second hinge block (2323) is provided with a second arc-shaped long slot (2324);

a second hinge groove (2111) is formed in the first connecting piece (Q1), and a second arc-shaped rib (2112) is arranged in the second hinge groove (2111);

the second hinge block (2323) is accommodated in the second hinge groove (2111) in a matching manner, and the second circular arc-shaped rib (2112) is accommodated in the second circular arc-shaped long groove (2324) in a matching manner.

10. The turning mechanism (23) according to any one of claims 1 to 6, characterized in that the hinge axis of the first door panel (232) and the base (231) is a first hinge axis (L1);

the first hinge axis (L1) is located on one side, towards which the binding face of the base (231) faces, and is arranged at an interval with the binding face of the base (232).

11. The turning mechanism (23) according to any one of claims 1-6, characterized in that the hinge axis of the first connection (Q1) to the first door panel (232) is a second hinge axis (L2);

the second hinge axis (L2) coincides with the second edge (b).

12. The turning mechanism (23) according to any one of claims 1-6, further comprising a second door panel (235), a second connector (Q2) and a second swing arm (236);

the second door panel (235) is hinged to the base (231), the second connecting piece (Q2) is hinged to the second door panel (235), and the second connecting piece (Q2) is used for being fixed with the second shell (22);

a third guide sliding groove is formed in the second door panel (235); a fourth guide chute is arranged on the second connecting piece (Q2); one end of the second swing arm (236) is hinged to the base (231), and the other end of the second swing arm (236) is provided with a second sliding part which can be slidably connected into the third guide sliding groove and the fourth guide sliding groove;

the second door panel (235) and the second shell (22) are provided with abutting surfaces, and the abutting surfaces are used for abutting the folding screen (10);

the second link (Q2) is rotatable with respect to the base (231) between an unfolded position and a folded position; when the second connector (Q2) is in the unfolding position, the abutting surface of the base (231), the abutting surface of the second door panel (235) and the abutting surface of the second shell (22) are arranged in a coplanar manner and have the same orientation; when second connecting piece (Q2) is in when folding position, the binding face of base (231) with be used for the laminating between the binding face of second door plant (235) the contained angle of one side of folding screen (10) is less than 90, the binding face of second door plant (235) with be used for the laminating between the binding face of second casing (22) the contained angle of one side of folding screen (10) is greater than 180, just the binding face of second casing (22) with the binding face of base (231) is perpendicular.

13. A support device (20) comprising a first housing (21), a second housing (22) and a rotating mechanism (23) according to any one of claims 1 to 12, wherein the rotating mechanism (23) is located between the first housing (21) and the second housing (22), and a first connecting member (Q1) of the rotating mechanism (23) is fixed to the first housing (21), and a base (231) of the rotating mechanism (23) is connected to the second housing (22).

14. An electronic device (100) characterized in that it comprises a folding screen (10) and a support device (20) according to claim 13;

the folding screen (10) comprises a first portion (11), a second portion (12) and a third portion (13), the third portion (13) being located between the first portion (11) and the second portion (12);

the first part (11) is supported and fixed on a binding surface of a first shell (21) of the supporting device (20), the second part (12) is supported and fixed on a binding surface of a second shell (22) of the supporting device (20), and the third part (13) is supported and fixed on a rotating mechanism (23) of the supporting device (20).

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